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To improve productivity and lower the capital cost, a single gas chromatograph has been configured to perform two standard methods: CAN/CGSB-3.0 and ASTM D-5580.
Detailed hydrocarbon (DHA) analysis of automotive gasoline has become a routine gas chromatographic method. The Canadian standard CAN/CGSB-3.0 requires cryogenic temperature programing to provide better separation of early-eluting components than conventional non-cryogenic DHA measurements. Determination of aromatics in the presence of methanol and ethanol is also an important requirement for bio-ethanol; method ASTM D-5580 is the standard method for this analysis.